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