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