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