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