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