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