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