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