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