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