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