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