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