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)(19,29,32,39)(20,25,36,44)(21,26,22,27)(24,33,40,31)(30,45,46,41)(34,48,47,38)(35,42,37,43)(1,2)(3,7)(4,8)(5,13)(6,9)(10,14)(11,15)(12,16)(17,19)(18,24)(20,34)(21,33)(22,31)(23,32)(25,41)(26,29)(27,39)(28,40)(30,35)(36,47)(37,46)(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)(19,30,32,46)(21,35,22,37)(24,38,40,48)(26,42,27,43)(29,41,39,45)(31,34,33,47)(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,16,10)(17,21,23,22)(18,26,28,27)(19,31,32,33)(20,35,36,37)(24,39,40,29)(25,42,44,43)(30,34,46,47)(38,45,48,41)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.