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)(21,22,27,29,26,30,24,34)(23,31,32,36,33,28,35,25)(5,7)(6,10)(8,14)(9,15)(11,17)(12,13)(16,20)(18,19)(21,23)(22,28)(24,35)(25,29)(26,33)(27,32)(30,31)(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)(22,29,30,34)(23,32,33,35)(25,28,36,31)(7,15)(10,13)(14,20)(17,19)(23,33)(25,36)(28,31)(32,35) involution — undirected(6,12)(10,13)(11,18)(17,19)(21,25,27,31,26,36,24,28)(22,23,29,32,30,33,34,35)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.