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