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