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