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