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