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