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