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