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