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