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