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