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