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