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