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