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