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