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