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