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