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