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