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