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