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