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