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