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