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