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