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