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