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