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