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