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