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