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