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