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