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