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