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