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