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