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