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