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