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