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