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