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