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