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