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