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