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