One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,12)(10,15)(11,13)(14,16)(20,27)(22,29)(23,28)(25,31)(33,34,38,42)(35,43,46,47)(36,41,37,40)(39,44,48,45)(2,6)(4,12)(7,13)(8,9)(11,16)(14,15)(17,18)(19,22)(20,28)(21,24)(23,27)(25,32)(26,29)(30,31)(33,35)(34,39)(36,44)(37,45)(38,46)(40,47)(41,43)(42,48) involution — undirected(1,3,5,10)(2,7,8,15)(4,11,12,16)(6,13,9,14)(17,19)(18,22)(20,25)(21,26)(23,30)(24,29)(27,31)(28,32)(34,40)(36,37)(39,47)(41,42)(43,48)(44,45)(2,8)(3,10)(6,9)(11,16)(17,20,21,27)(18,23,24,28)(19,25,26,31)(22,30,29,32)(33,36,38,37)(34,41,42,40)(35,44,46,45)(39,43,48,47)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.