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