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