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