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