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