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