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