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