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