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