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)(21,22,26,30)(23,32,33,28)(24,34,25,29)(27,31,35,36)(5,7)(6,10)(8,14)(9,15)(11,17)(12,13)(16,20)(18,19)(21,23,26,33)(22,28,30,32)(24,35,25,27)(29,36,34,31)(2,4)(5,8,9,16)(6,11,12,18)(7,14,15,20)(10,17,13,19)(21,24,27,23,26,25,35,33)(22,29,31,28,30,34,36,32)(6,12)(10,13)(11,18)(17,19)(22,30)(28,32)(29,34)(31,36) involution — undirected(7,15)(10,13)(14,20)(17,19)(21,25,35,23,26,24,27,33)(22,29,36,32,30,34,31,28)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.