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