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