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