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