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