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