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