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