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