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