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