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