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