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