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