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