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