One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,13)(7,9)(12,16)(20,27)(24,29)(25,31)(30,32)(33,34,38,40)(35,39,42,36)(37,45,46,41)(43,44,48,47)(1,2,6,3)(4,7,11,9)(5,8,13,10)(12,14,16,15)(17,18)(19,23)(20,24)(21,22)(25,30)(26,28)(27,29)(31,32)(33,35)(34,39)(36,40)(37,43)(38,42)(41,47)(44,45)(46,48)(4,11)(7,9)(12,16)(14,15)(18,22)(23,28)(24,29)(30,32)(34,40)(35,42)(41,45)(43,48) involution — undirected(1,3,6,2)(4,9,11,7)(5,10,13,8)(12,15,16,14)(17,19,21,26)(18,23,22,28)(20,25,27,31)(24,30,29,32)(33,36)(34,35)(37,44)(38,39)(40,42)(41,43)(45,48)(46,47)(1,4,6,11)(2,7,3,9)(5,12,13,16)(8,14,10,15)(17,18)(19,23)(20,24)(21,22)(25,30)(26,28)(27,29)(31,32)(33,35)(34,36)(37,43)(38,42)(39,40)(41,44)(45,47)(46,48)(1,5)(2,8)(3,10)(4,12)(6,13)(7,14)(9,15)(11,16)(17,20)(18,24)(19,25)(21,27)(22,29)(23,30)(26,31)(28,32)(33,37,38,46)(34,41,40,45)(35,43,42,48)(36,44,39,47)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.