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)(13,14,17,19)(15,16,18,20)(21,22,26,25)(23,27,31,30)(24,32,34,28)(29,36,33,35)(5,6,8,9)(7,11,12,10)(13,15)(14,16)(17,18)(19,20)(22,25)(27,30)(28,32)(35,36)(6,9)(10,11)(13,16)(14,18)(15,19)(17,20)(21,23,26,31)(22,27,25,30)(24,33,34,29)(28,36,32,35)(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(21,24)(22,28)(23,29)(25,32)(26,34)(27,35)(30,36)(31,33)(5,7,8,12)(6,10,9,11)(21,25,26,22)(23,30,31,27)(24,32,34,28)(29,36,33,35)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.