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