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