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