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