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