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