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