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