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