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