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