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