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