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