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