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