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