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