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