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