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