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