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