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