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