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