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