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