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