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