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