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