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