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