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