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