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