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