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