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