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