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