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