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