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)(11,16)(12,14)(13,15)(17,18,22,23)(19,24,30,29)(20,31,34,25)(21,26,35,36)(27,32,41,37)(28,38,42,43)(33,44,46,39)(40,45,48,47)(1,3,4,8)(2,5,6,7)(17,19)(18,24)(20,32)(21,28)(22,30)(23,29)(25,27)(26,38)(31,41)(33,45)(34,37)(35,42)(36,43)(39,40)(44,48)(46,47)(9,11,13,12)(10,14,15,16)(17,20,22,34)(18,25,23,31)(19,27,30,41)(21,33,35,46)(24,37,29,32)(26,39,36,44)(28,40,42,48)(38,47,43,45)(2,6)(5,7)(17,21)(18,26)(19,28)(20,33)(22,35)(23,36)(24,38)(25,39)(27,40)(29,43)(30,42)(31,44)(32,45)(34,46)(37,47)(41,48) involution — undirected(3,8)(5,7)(9,12,13,11)(10,14,15,16)(18,23)(19,29)(21,35)(24,30)(25,31)(27,32)(28,38)(33,46)(37,41)(40,47)(42,43)(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.