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