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