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