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