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