One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,5)(6,10)(7,13)(8,14)(11,16)(12,15)(17,18,22,26)(19,23,27,30)(20,24,29,32)(21,25,31,28)(33,34)(35,42)(36,40)(37,45)(38,39)(41,47)(43,44)(46,48)(1,3)(2,7)(4,11)(5,12)(6,13)(8,16)(9,10)(14,15)(17,19)(18,23)(20,28)(21,24)(22,27)(25,29)(26,30)(31,32)(34,39)(36,42)(41,45)(44,48) involution — undirected(4,14)(5,8)(11,15)(12,16)(19,27)(20,29)(23,30)(24,32)(33,35,38,40)(34,36,39,42)(37,46,47,43)(41,48,45,44)(1,4)(2,8)(3,11)(5,10)(6,14)(7,16)(9,12)(13,15)(17,20)(18,24)(19,28)(21,23)(22,29)(25,27)(26,32)(30,31)(33,35)(34,36)(37,43)(38,40)(39,42)(41,44)(45,48)(46,47) involution — undirected(1,3)(2,9)(4,15)(5,12)(6,13)(7,10)(8,16)(11,14)(17,21)(18,25)(19,24)(20,30)(22,31)(23,29)(26,28)(27,32)(33,36)(34,40)(35,39)(37,44)(38,42)(41,46)(43,45)(47,48) involution — undirected(1,5,6,8)(2,4,10,14)(3,12,13,16)(7,11,9,15)(17,19)(18,23)(20,28)(21,24)(22,27)(25,29)(26,30)(31,32)(33,37,38,47)(34,41,39,45)(35,43,40,46)(36,44,42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.